From: Jagadeesh Bhaskar Pakaravoor <jagadeeshbp-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Nishanth Menon <menon.nishanth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Kevin Hilman
<khilman-1D3HCaltpLuhEniVeURVKkEOCMrvLtNR@public.gmane.org>,
Syed Rafiuddin <rafiuddin.syed-l0cyMroinI0@public.gmane.org>,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH][RFC] OMAP4: I2C Support for OMAP_4430SDP
Date: Thu, 4 Jun 2009 16:41:36 -0500 [thread overview]
Message-ID: <561678670906041441y4c592e61h71fd3cf6869bcf46@mail.gmail.com> (raw)
In-Reply-To: <782515bb0905291052h1d70be5em7cfdeeda903c39fc-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
> why is this 2600? omap3 could do 3.3Mhz.
>
There is a silicon issue reported on TWL5030 which says that it can
not operate at the stipulated highest frequency of 3.3MHz.
The information I got is this:
"I2C data hold time in HS mode is higher than specification when
reading I2C registers. This leads to a data setup issue which
introduces a frequency limitation in HS mode (can not reach 3.4MHz as
specified in I2C standard). The limitation is for the Control I2C, and
for SmartReflex I2C when using other products than OMAP34xx with SR.
HS mode is working OK for SR I2C when using OMAP34xx."
--
With regards,
Jagadeesh Bhaskar P
--------------------
Bugs are by far the largest and most successful class of entity, with
nearly a million known species. In this respect they outnumber all the
other known creatures about four to one.
—Professor Snopes' Encyclopedia of Animal Life
-------
next prev parent reply other threads:[~2009-06-04 21:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-29 14:38 [PATCH][RFC] OMAP4: I2C Support for OMAP_4430SDP Syed Rafiuddin
[not found] ` <55272.192.168.10.89.1243607905.squirrel-pJFUjGLopx31T2qfsofKZtBPR1lH4CV8@public.gmane.org>
2009-05-29 15:24 ` Kevin Hilman
[not found] ` <878wkghqzi.fsf-1D3HCaltpLuhEniVeURVKkEOCMrvLtNR@public.gmane.org>
2009-05-29 17:52 ` Nishanth Menon
[not found] ` <782515bb0905291052h1d70be5em7cfdeeda903c39fc-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-04 21:41 ` Jagadeesh Bhaskar Pakaravoor [this message]
[not found] ` <561678670906041441y4c592e61h71fd3cf6869bcf46-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-06-05 2:28 ` Nishanth Menon
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